Etymologies

(American Heritage® Dictionary of the English Language, Fourth Edition)

deca- + -gon (Wiktionary)

Examples

In Friday's edition of the journal Science, Lu and Princeton physicist Paul Steinhardt report finding a set of polygon-shaped tiles — a decagon, pentagon, diamond, bowtie and hexagon — that were arranged into distinctive patterns found on major Islamic buildings from the 12th through 15th centuries.

Art historians have until now assumed that the intricate tilework had been created using straight edges and compasses, but the study in Science suggests the Islamic artisans were using a basic toolkit of girih tiles made up of shapes such as the decagon, pentagon, diamond and hexagon.

In Friday's edition of the journal Science, Lu and Princeton physicist Paul Steinhardt report finding a set of polygon-shaped tiles -- a decagon, pentagon, diamond, bowtie and hexagon -- that were arranged into distinctive patterns found on major Islamic buildings from the 12th through 15th centuries.